Xanthippe invited us to a game of Solitaire, in which pegs are removed
by making jumps over them. The key grid allocated numbers to letters or
pairs of letters and these numbers indicated the order of the moves in
the game. Gregson used pieces of paper on a large grid to play the game
and the last four moves spelled the word DIAMOND with the letter D
remaining in the central square. This was a clever crossword which, in
the end, was not as difficult as Gregson had feared. In fact, once you
had completed the key grid you could work out the left over letters and
guess the keyword without answering the solitaire clues.